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OBSERVATIONS made on the Performance of the Engines of the Steam Ship Wilberforce, from London to Hull,
April 7th, 1838.
Time.
Pressure of
steam in
lbs.
per square
inch.
Velocity
of
engines»
Condens
gauges
h.
m.
8
30
....
....
....
0
37
....
....
....
11
43
....
....
. . . .
1
15
G-0
21
29-0
2
30
5-5
21
29-0
3
30
3-0
2025
29-5
4
30
35
19-75
29-5
5
30
3-5
19
29-5
5
45
....
....
....
e
30
4-5
20
29-5
G
40
5-0
21
29-3
7
30
4-5
20
29*4
8
0
4-25
19-5
29-4
8
30
4-25
18
29-4
8
45
50
....
....
0
45
60
20
29 0
11
0
GO
18-5
29 0
11
30
65
19
29-0
12
5
....
....
12
30
5-0
20-5
29-3
12
45
5-0
21
29-3
1
30
C*5
17
290
7
30
4-75
20
29-4
10
0
3-5
19
29-5
10
30
5-0
19
29-3
11
30
4-5
19*5
29-4
12
25
....
....
....
Number.
10175
3930
4-84
19-Gi
23(
21
20
Temperature
of
water.
Temperature
of water
from
condenser.
Temperature
of water
from air
pumps.
43°
59°
54°
39° Sea
57°
5G°
40" Humber
56°
53°
Temperature
of water
from casing
round chimney.
71°
Temperature
of the
atmosphere.
Observations.
Left St. Katherine’s Wharf, draught forward, 10 ft. 5 in., draught
aft, 11 ft. 8 in.
Abreast of Blackwall.
Abreast of Gravesend.
Abreast of the Nore Light vessel.
Took Diagram No. 1, larboard engine.
Heavy swell.
Abreast of Orfordness.
Heavy swell, wind due W. Fore sail, top, and square sail set»
Abreast of Lowestoff. Heavy sea; vessel rolling.
Heavy swell; fore sail and top sail.
Gib and fore sail; wind NW.
Took Diagram No. 2, abreast of Winterton; wind NW., blowing
very hard.
Abreast of Hasborough lights.
Abreast of Cromer.
Abreast of the Dudgeon; gale from the NW.
Strong head wind and ebb tibe in the Humber; took Diagram No. 3,
Abreast of the Hull Docks.
Total time occupied from London to Hull, the vessel being very
heavily loaded, with a considerable swell of the sea all the way,
and 11 hours’ gale—27 hours, 55 minutes.
388 EXPLANATION OF THE PLATES.
